8087544865 has 4 divisors (see below), whose sum is σ = 9705053844. Its totient is φ = 6470035888.

The previous prime is 8087544863. The next prime is 8087544917. The reversal of 8087544865 is 5684457808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4110476769 + 3977068096 = 64113^2 + 63064^2 .

It is a cyclic number.

It is not a de Polignac number, because 8087544865 - 2¹ = 8087544863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8087544863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808754482 + ... + 808754491.

It is an arithmetic number, because the mean of its divisors is an integer number (2426263461).

Almost surely, 2^8087544865 is an apocalyptic number.

It is an amenable number.

8087544865 is a deficient number, since it is larger than the sum of its proper divisors (1617508979).

8087544865 is a wasteful number, since it uses less digits than its factorization.

8087544865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617508978.

The product of its (nonzero) digits is 8601600, while the sum is 55.

The square root of 8087544865 is about 89930.7781852242. The cubic root of 8087544865 is about 2007.2689545602.

The spelling of 8087544865 in words is "eight billion, eighty-seven million, five hundred forty-four thousand, eight hundred sixty-five".